Dependable, high-capacity magazine handles like a standard AR-15/M16 magazine. Rigorously range-tested for reliable function in both semi- and full-auto rifles. Extended, anti-tilt follower acts as a bolt stop after last round is fired. Tough, impact-resistant poly-carbonate shell and follower are self-lubricating, so they work with the constant-force spring to deliver smooth, uniform feeding for consistent operation. Steel hex screws securely hold the mag body halves together to ensure exceptional strength and rigidity, yet are easily removable for disassembly and cleaning. Stainless steel feed lips stand up to high-stress, high- volume shooting applications and let you to store the mag fully loaded for long periods of time.